code: def test_returns_dataframe():
      "Base DataFrame"
      return pd.DataFrame(
          {"text": ["a1a2", "b1", "c1"], "numbers": [1, 2, 3]},
          index=["A", "B", "C"],
      )
  
imports: import numpy
  import pandas
  import pytest
  from pandas.testing import assert_frame_equal
label_desc: Use image node_id 2 for calling a global function with example usage: test_returns_dataframe() and returns: pd